Before using it for the first time, remove the protective film from both sides of the shield. Place the shield onto the frame. Place the frame directly onto your head and rest against your forehead. Adjust the elastic band as needed to fit head size. The shield can be rotated up or down Remove and dispose of clear shield and replace the shield on the frame after each use. If reusing shields, clean and disinfect after each use. Anti-fog, lightweight, and unobstructed view. The product is not intended or approved for medical use.